Sorry, unfortunately the Nostalgia Air schematic for this Firestone radio model S-7398-5 doesn’t give me much on resistance values especially for any coils. All I have for the oscillator coil is the Firestone diagram #57, part number 500248, which is useless to us. Perhaps you can hopefully find something on a forum.

Thanks for the kind comment.

All's good.

I agree. but I brought it back to life. Thanks for watching.

Thanks, a Firestone radio is coming up next which had a ton of issues.

Thanks, I love everything on your channel also.

Thanks

I agree Jeffrey; it’s a shame and very disappointing that the picture tube heater was open on this nice looking 1981 TV. Very rare for this year set, I’ve seen this on one other TV but it was much older. The heater usually goes through a separate primary winding of the flyback transformer which I’m thinking since I didn’t have any HV the flyback took out the heater as well. Thank for your comment.

My transmitter is very close on the top shelf of my work bench, that being said I still can get some hum, but I have a Ground Loop Isolator, also known as Noise Filter or an “in line 3mm audio filter” which I plug directly in the back of the Hurricane. Amazon has theses. My radios are mostly powered through my isolated transformer which eliminates the earth ground. It might help to add these ground loop isolators to the receiving radios also. Big LED lights and definitely CFL/Halogen bulbs will cause interference. Radio reception is better than others on various radios. I’m using this Hurricane for restored radios and when I transmit to other rooms, I use my FM transmitter for that. Just experiment with several things to get the best reception. Perhaps if your radios have the 3 prong grounded plugs, you could try using an adapter eliminating the earth ground and or install ferrite coils, also known as a ferrite bead, a ferrite choke, or an RFI choke wrapped around the power cord. You can find these installed on things like AC adapters like laptops etc. If you’re using Bluetooth I can’t help you there since I don’t have that option, but I would try all the suggestion above. Good Luck!

It requires a 25 or lower-watt incandescent light bulb only.

The Service Manual shows the D314 as part number US1035. Use number 1035 and it’s a schottky 10A, 35V diode, package 220. The D318 diode is showing a part number as MZ-043, use MZ043. Not much data on this one other than the MZ043 diode appears to be a Zener diode from the MIC Group Rectifiers series. Zener diodes are often used for voltage regulation, providing a stable reference voltage. You can Google cross references for these diodes but the MZ043 zener you might have a hard time locating this diode. Sorry, that’s all I can do at my end. Good luck with your repair.

Yes, it’s a TRF radio which I did mentioned in my video but obviously edited it out unintentionally. The tuning condenser is a dual gang for RF. Thanks for correcting my mistake there.

Yes Patrick, this is a hot chassis, like most of the radios where the tube heaters are in series. My variac also has an isolated transformer incorporated in it. Thanks for your concern.

@@kenslab1973 no problem I did tv radio repair when I was younger Working for zenith . System 3 era

Thanks for watching Jeff.

Thanks for sharing.

Woolworths was my first job as a teenager before Interring into the Armed Forces. That's where I've seen that brand. Thanks for sharing.

We had a very similar lifestyle when my parents left the South to look for work. Thanks for sharing.

Yeah Frank, that volume pot wiring is confusing as hell. If the output is the wiper (which usually is) but the wiper is going to chassis which is also the B-side. We know that the B- has to complete several circuits but why isn’t one of the end nodes going to ground instead. It’s even weird that the volume pot is wired in the RF circuit instead of being wire closer to the output circuit. I got the schematic from Nostalgia Air and was hoping a knowledgeable viewer could clear up this mystery.

I have the Hurricane Intelligent AM medium Wave Transmitter without the Bluetooth and remote (all optional), ships from UK. No radio reception where I live. Thanks for watching and your compliment.

Even a lot of vintage solid-state radios also had the switch settings for either FM or FM AFC. Yes, in modern radios; especially those using digital signal processing (DSP), the need for AFC is often eliminated because the DSP can handle signal strength variations more effectively, I think perhaps the AGC was even eliminated. I think were on the same page here. Thanks for watching and the comment.

Thanks for watching and your comment.

Where is here?

Yes, we had some great radios back then, but we did have our share of crap radios depending on the year and manufacture in my opinion.

@@randyab9go188 Australia

Hi, thanks for watching.

It’s fine. The camera doesn’t do the actual quality of the picture any justice, and the old VCR is what it is.

Thanks, Frank

Thanks, Michael, for your informative comment, always great to get them from my viewers. I replaced all film capacitors and resistors that were out of tolerance, shown in this part 1 video. The selenium rectifier being old had very high resistance and was causing the 45% drop in the B+ voltage. Were on the same page here and by replacing the 19V8 first audio tube, that corrected the distorted sound issue after the radio got to operating temperatures. So, the plate from the first audio tube was causing the voltage variation to the control grid of the output tube. Can’t depend on tube testers at times where they respond differently under a real load. All the best.

@@kenslab1973 Selenium rectifiers do degrade with age, and they should be replaced with silicon types. You may need to add 47 to 100 ohms in series with the silicon diode to match the normal series resistance of the selenium rectifier and keep the B+ voltage from getting too high. Use a flameproof or fusible resistor, because if the silicon diode, or anything else in the circuit, shorts, this resistor will be the fuse to protect from further damage or even fire. The first audio tube itself will not cause the output tube to draw too much current; how much current this tube draws is determined by the voltage on its control grid relative to its cathode. With most radio output tubes (such as 35B5, 35C5, 50B5, 50C5, 35L6GT, 50L6GT), the cathode bias resistor is usually 150 ohms and drops about 7.5 volts, making that cathode 7.5 V positive relative to 0V circuit common. The control grid is biased at 0 volts by a large value grid resistor, usually 470K ohms, also connected to 0v common. If the output tube grid is more than one half volt positive, the coupling capacitor from the plate of the first audio tube is leaky, the grid resistor is open or very high in value, or, especially if the current climbs and the sound degrades with time after the radio has been on for a while, the grid of the output tube is contaminated with some of the cathode emissive coating material and is trying to become like the cathode. As this happens, the output tube plate may start to glow red. Obviously, the tube is bad and must be immediately replaced.

Perhaps, you would have to post your email address to discuss the specifics. Thank you for your confidence in me.

​@@kenslab1973здравствуйте как с вами списаться по поводу ремонта!?

I don’t exactly know what you’re referring to; if it’s the 3D woman character, I always like to add something different in my videos from time to time. Thanks for your comment.

Thanks for the request; I plan on doing some more TVs in the future but their hard to come by, especially when I prefer them to be color TV’s and in non-working condition.

Thanks Steve, I did use the Rider’s schematic and all E-Caps connections were spot on as you mentioned. The green negative wire was wired to all E-Caps internally when I re-stuffed it. I agree about the mistakes made on circuit diagrams, I have found mistakes on Rider’s and even the actual PhotoFact’s over the years to include alignment instruction. It’s always nice to get heads up on possible issues. God only knows how many mistakes I made myself.

@@kenslab1973 Ï HAVE 300 BELLY BUTTONS

Hahaha. unfortunately. =(

Thanks for watching!

Thank You!

Thanks so much Frank, I ran into a few speed bumps along the way, but I kept plugging away at it.

Jose, I purchased my radio stand about 12 years ago and have no idea how much it cost me back then. I got the small one, here’s the web address. www.radiostands.com

Thanks Frank :)

Thanks for watching and your comment.

Thanks Frank!

Thank You!

Glad you like the radios, Thanks for watching and the reply.